MXPA02009397A

MXPA02009397A - Multicontact electrical connector and rotating electrical machine bearing same.

Info

Publication number: MXPA02009397A
Application number: MXPA02009397A
Authority: MX
Inventors: Roger Abadia
Original assignee: Valeo Equip Electr Moteur
Priority date: 2001-01-24
Filing date: 2002-01-16
Publication date: 2003-02-12
Also published as: WO2002060038A1; EP1269604A1; KR20020090220A; JP4041401B2; FR2819943B1; JP2004517460A; US20030109149A1; FR2819943A1; KR100876511B1; EP1269604B1; US6692278B2

Abstract

The invention concerns a connector for providing electrical connection between a first subassembly (15) comprising at least two first electrically conductive elements and a second subassembly (16) comprising at least two second electrically conductive elements wherein assembling means (60) are interposed between the pressure zone and the reaction zone to clamp therebetween first and second bearing surfaces and wherein the first subassembly (15) comprises a housing (18) for positioning and flexibly mounting the first elements, said housing bearing the pressure zone and comprising opposite the pressure zone an orifice (71) to enable a movement of the first bearing surfaces.

Description

MULTICONTACT ELECTRICAL CONNECTORS AND ROTATING ELECTRICAL MACHINE THAT SUPPORTS FIELD OF THE INVENTION The invention relates to a multi-contact electrical connector and a rotating electrical machine that supports it. The invention specifically relates to a connector for making an electrical connection between two sub-assemblies, and this connector forms part of a connection device that includes electrical cables that connect the two connectors linked with each of the sub-assemblies to each other. A connector of these characteristics is described in document FR-A-2 754 650. Some devices of motors or electric generators, for example alternators or alternators-starters, must be electrically connected with a second device, such as a control or drive system mounted inside a box known as an electronic box. Each phase of one of these devices must be connected to the corresponding phase of the other device. This connection can be established by direct contact of the corresponding phases of the two devices, but is commonly carried out by means of cables that include several electrical wires, and each of these electrical wires allows one phase to be connected.

It is therefore necessary to make an electrical connection between the end of each wire and the corresponding phase of the device.

STATE OF THE ART One solution consists of contacting one end of a wire with the corresponding conductive zone of the device and of ensuring the permanence of the contact by means of an assembly with the use of a screw. This solution has several drawbacks. On the one hand, it is essential to carry out as many assemblies as there are necessary electrical connections, which represents a significant cost in that the number of parts is increased, as well as the assembly time necessary to carry out all the connections. On the other hand, the contacts are made by simple pressure between the conductive areas of the device and the cable, and therefore are at the expense of vibrations and are also affected by external environmental conditions, which increases the risk of corrosion and deterioration of the electrical contact. French patent 96.12609, published under the number FR-A-2 754 650 (US-A-5 924 897), proposes an electrical connection that allows to secure, on a single fixing point, several electrical contacts between two electrical devices. The proposed electrical connection also guarantees sufficient tightness to protect the electrical contacts against the corrosion. The electrical connection element is composed of two parts, male and female, and each of these parts includes at least two conductive elements each corresponding to an electrical phase. These two parts are brought into contact using a single means, for example a screw-nut assembly, which allows the male part to be fixed against the female part. It is also possible to use elastically deformable means to guarantee the appropriate contact between the elements 10 electrically conductive, as well as an adequate distribution of the pressures, as described in document FR 0010737 published on 03/30/2001 (after the priority date of the present patent application) under the number FR-A-2 799 053. This solution is satisfactory, but requires the use of 15 additional elastically deformable means at the level of the first sub-assembly, as well as the first conductor elements, in the form of guided terminals which move following a translational movement. OBJECTS OF THE INVENTION The present invention aims to simplify the first subset of the connector, while preserving the reliability of this connector.

In accordance with the invention, a connector is described for making an electrical connection between, on the one hand, a first subassembly including at least two first electrically conductive elements, each with a first seat and, on the other hand, a second sub-assembly including at least two second electrically conductive elements, each with a second seat, and characterized in that the first seats should come into contact with the second seats on one of their surfaces, and resting with the other surface on a pressure zone that is part of the first sub-assembly, while the other surface of the second seats is supported on a reaction zone forming part of a support having the second sub-assembly for fixing the second elements, and in which mounting means intervene between the pressure zone and the reaction zone for adjusting and fixing between them the first and second ones; the second seats, as well as exerting contact pressure on the aforementioned seats, and also characterized the first subassembly includes a casing for positioning and flexing the first electrically conductive elements, and this casing includes, on the one hand, the pressure zone and, on the other hand, in front of the pressure zone, a hole to allow the movement of the first seats. According to the invention, there is also described a rotating electric machine that includes a bearing or rear support, characterized in that the second subassembly of the connector rests on the aforementioned rear support.

Thanks to the invention, particularly during the flexural assembly of the first electrically conductive elements, it is possible to eliminate the additional elastically deformable means of the first sub-assembly, while retaining a reliable contact between the first and second similar conductive elements, reducing the amount of necessary parts and simplifying the crankcase. Flatness defects can be corrected, at least in large part, because the contact area between similar electrically conductive elements is wide, and that the risks of overheating of the connector are reduced. The connection between the cables and the first conductor elements is simple. In one embodiment, the crankcase is characterized in that it is delimited, on the one hand, by a box for positioning the first elements and, on the other hand, by a clamping cover that includes the pressure zone, and characterized in that the box includes, in front of the pressure zone, a hole to allow the movement of the first seats. In another embodiment, the pressure zone is adapted on the crankcase, provided with a hole to allow the movement of the first seats. The pressure zone is connected, for example, in an airtight manner by means of safety fastening, bonding, ultrasonic welding, mirror arc welding, laser welding, etc., on the crankcase. Preferably, the crankcase is formed by an overmolding technique on the first electrically conductive elements, which in this way are placed in position. It should be noted that the first seats are visible at the level of the crankcase hole so that they can be bent. The first electrically conductive elements extend perpendicularly to the mounting axis and, in one embodiment, are in the form of metal strips, particularly in the form of tabs, which in their rear part constitute terminals for connection of the electric cables, in such a way that the solution is simple, economical and reliable. In one embodiment, three first and second electrically conductive elements are included. This arrangement allows to carry out contacts of wide area, allowing in turn the passage of currents of great intensity, while having a good distribution of pressures. Preferably, the housing and the clamping cover have dividing walls for electrically separating and insulating the first conductive elements. The box has positioning means, for example protrusions, for the first conductive elements. The box serves as a receptacle for these first conductive elements before being closed by the clamping cover and, preferably, is made of a less rigid material and cheaper than the cover.

Preferably, the box has ribs to increase its strength, and the same applies to the cover, which also includes means for preventing the first conductive elements from rising. In this way, the flexing of the first electrically conductive elements is controlled. Preferably, to occupy less space, locking means are implanted in rotation of the first sub-assembly taking advantage of the spaces that circumferentially separate the first and second contact seats. These media have dividing walls that leave the reaction zone. These dividing walls thus fulfill a double function, since they give rigidity to the reaction zone and at the same time electrically insulate the second seats.

BRIEF DESCRIPTION OF THE DRAWINGS Other features and advantages will become apparent upon reading the description, with reference to the accompanying drawings in which: Figure 1 is a perspective view of the connector according to the invention mounted on the bearing or rear support of a machine revolving polyphase electric and reversible, which constitutes an alternator-starter motor; Figure 2 is a partial view in axial section of the connector along the line 2-2 of Figure 1, illustrating the mounting means that includes this connector; - Figure 3 is a perspective view of the second sub-assembly including the aforementioned connector; Figure 4 is a perspective view of the clamp cover forming part of a first sub-assembly including the aforementioned connector; Figure 5 is a perspective view of the positioning box forming part of the first sub-assembly of the aforementioned connector; Figure 6 is a perspective view of the connector mounted on the rear support of the rotating electrical machine, without the clamping cover; Figure 7 is a perspective view of the connector from a different angle, to illustrate the ribs of the clamping cover.

DESCRIPTION OF THE PREFERRED MODALITIES OF THE INVENTION In the description, an orientation from front to back and top and bottom will be used, corresponding to the orientation from left to right and above and below, according to figures 1 and 2. A connector according to the invention is described in the figures. invention consisting of a first upper sub-assembly 15 connected to electric cables 120, 121 and 122, and a second lower sub-assembly 16 connected to the armature of a rotating electrical machine, for example to the stator of an automobile alternator, which in another embodiment can be a reversible device and also function as an electric motor to start the automobile. This type of alternator is known in the art as an alternator-starter motor. In this case, the connector is mounted on the rear support 170 of an alternator-starter motor, as described in document FR-00 03131, filed on March 10, 2000 and published under number FR-A-2 806223, to which reference will be made for further details. This rear support 170 carries, in a fixed manner, a brush holder 171, whose brushes (not shown) are intended to come into electrical contact with the slip rings fixed to a shaft that carries the rotor, constituting the inductor of the rotating electric machine, which in this case it is polyphasic. For this, the collector rings are connected on their ends with an excitation winding that is part of the rotor, commonly Lundell type with nails or teeth. In another embodiment, the rotor is a protruding pole rotor, as described in the document PCT / FR / 02/00037. The rear end of the rotor shaft rests on the rear support, which includes in its central portion a bearing for these effects. The rotor is surrounded by the stator of the machine constituting the armature thereof, and partially supported by the back support 170. The stator has, in a manner known in the art, a body in the form of a package of notched sheets for the assembly of electrically conductive windings that are part of the phases of the machine. The windings are of the type of metallic wires or, in another modality, of the type of bars, as it is described in the document FR 0104770 presented on 04/05/2001. The outputs of the phases are connected in this case by crimping, and in another mode by welding, each to one of the ends of the second electrically conductive elements 30, 31 and 32, which includes the second sub-assembly 16 of the connector in accordance with the invention. In this embodiment, three elements 30, 31 and 32 are contemplated, and the electric machine is of the three-phase type. The aforementioned ends of the elements 30 to 32 consist of bare crimp legs, such as those described in document FR-A-2 754650. These electrically conductive elements, 30, 31 and 32 consist of electrically conductive strips, in this case metallic, embedded in an electrically insulating part 17 that forms a support fixed by screws 172 on the rear support 170 of the machine. The screws 172 have a head that rests on the support, and each one crosses a column (without reference numeral in the figures) until it is fixed on the threading of the rear support 170. The columns, constitute sleepers and are in one piece together with the support 17, since they come from the same mold, and are therefore electrically insulating. The electrically conductive elements, 30, 31 and 32 they present, on their other end, uncovered second seats 33, 34 and 35 and which are in contact, in this case directly, and in another embodiment indirectly, by means of an intermediate layer, each with a reaction zone 53, 54 and 55 forming part of the support 17. These seats 32 to 35 are in the form of annular zones and are mounted on the upper surface of a protrusion 50 of the support 17 which in this case carries a brush holder 171, so that the conductive elements 30 a 32 have elevations at the level of the second seats 32 to 35. The support 17 is made of a moldable plastic material, and the brush holder 171 comes from the same mold together with the support 17. The connector according to the invention is part of the invention. a connection device that intervenes between the rear support and a system for driving the armature phases of the machine mounted in the electronic box. This connection device includes another connector mounted on the electronic box and the electric cables 121, 122 and 123 connect the two connectors together. Each cable is constituted by electrically conductive metallic wires, each one protected with an electrically insulating sheath, and surrounded in turn by a common sheath that includes, if necessary, a metallic braid of electromagnetic shielding of the electric cable.

According to the invention, the connector for making an electrical connection between, on the one hand, a first sub-assembly 15 including at least two first electrically conductive elements 20, 21 and 22 each constituting a first seat 23, 24 and 25 and , on the other hand, a second sub-assembly 16 including at least two second electrically conductive elements 30, 31 and 32 each constituting a second seat 33, 34 and 35, characterized in that the first seats 23, 24 and 25 are intended to enter in electrical contact with the second seats 33, 34 and 35 on one of its surfaces or faces and, on its other surface, in abutment against a pressure zone 43, 44 and 45 which forms part of the first sub-assembly 15, while the other The surface of the second seats 33, 34 and 35 should rest against a reaction zone 53, 54 and 55 that forms part of a support 17 carrying the second sub-assembly 16 in order to be able to fix the second elements 30, 31 and 32, and in which the mounting means 60 intervenes between the pressure zone 43, 44 and 45 and the reaction zone 53, 54 and 55 to adjust the first and second seats 33, 34, 35-43 together. , 44, 45 and thus exert a contact pressure on these seats, and further characterized in that the first subassembly 15 includes a casing 18 for mounting and mounting by flexing the first elements 20, 21 and 22, and further characterized by the crankcase 18, on the one hand, carries the pressure zone 43, 44 and 45, and on the other hand, includes a hole 71 in front of the pressure zone 43, 44 and 45 to allow movement of the first seats 23, 24 and 25 .

In the figures it can be seen that the crankcase 18 is delimited, on the one hand, by a positioning box 70 of the first elements 20, 21 and 22, and on the other hand, by a clamping cover 80 that includes the pressure zone 43, 44 and 45. This box 70 has, opposite the pressure zone 43, 44 and 45, a hole 71 to allow movement of the first seats 23, 24 and 25. In this way, the first electrically conductive elements have , on its free ends, with flexible seats and therefore elastic. The amount of conductive elements will depend on the applications. It is possible to include two, four and even six conductive elements. In this case, three first and second conductor elements are included, thereby obtaining a good coupling between the relevant contact surfaces of the conductive elements, the correct distribution of the pressures and the passage of strong currents of electric currents. The pressure and reaction zones are divided in this case into three parts, respectively by three slots 46 to 48 and three partition walls 56 to 58 which are described below. The cover 80, the box 70 and the support 17 are made of a mouldable and electrically insulating material, so that they can be conferred the desired configuration in accordance with the different functions that they will have to fulfill. Preferably, ribs 79, 89 are included to reinforce these pieces 70, 80. In another embodiment, these plastic materials are reinforced by fibers. The pressure zone 43, 44 and 45 is made of an electrically insulating and flow resistant material for properly bending the first conductor elements 20 to 22. The cover 80 is made of an electrically insulating and flow resistant material. Reaction zone 53, 54 and 55 is made of an electrically insulating and flow resistant material to properly encase the adjustment efforts. The reaction zone 53, 54 and 55 and the cover 80 are made of a thermosetting plastic material to ensure adequate adjustment of the electrically conductive elements to each other. In one embodiment, the material of the reaction zone has greater resistance to flow than the material of the rest of the support 17, such that the second sub-assembly 16 is economical and allows adequate overmolding of the support 17 around the second electrically conductive elements. 30 to 32, by choosing a relevant material to form the rest of the support. In another embodiment, the support 17 is constituted by a single material that includes reinforcement inserts at the level of the reaction zone. The box 70 is made, in this case, of a plastic material, less resistant to flow than the material of the cover 80 and, therefore, more economical. The reaction zone 53, 54 and 55 consists in this case of a protuberance 50 configured in such a way that it can penetrate into an opening 71 of the box 70 which, consequently, does not undergo an adjustment effort. The protuberance 50 has a central opening 159 to allow the passage of the mounting means 60. From the reaction zone, axially projecting with respect to the mounting axis AA of FIG. 2, dividing dividing walls 56, 57 and 58 to separate , in this case circumferentially, the second seats 33, 34 and 35 with each other. The dividing walls extend radially from the outer periphery of the reaction zone 53, 54 and 55 to a central ring 159 projecting axially from the aforementioned reaction zone. The central opening of the ring 59 extends the central opening 159 of the protrusion. The central ring 59 and the protuberance 50 are therefore adapted to be traversed centrally by the mounting means 60. The reaction zone 53, 54 and 55 is therefore hollow in its interior, that is, in its central portion, for allow the passage of these mounting means.

The external periphery of the protrusion 50 that carries the reaction zone 53, 54 and 55 has in this case a cylindrical shape for penetrating, with a certain assembly set, into the hole 71, which in this case has a circular hole shape. The pressure zone 43, 44 and 45 consists of an axial protrusion leaving the cover 80, directed towards the hole 71. The pressure zone 43, 44 and 45 is divided into annular sectors 43, 44 and 45 by means of slots 46. , 47 and 48 radial orientation. The width of these grooves 46, 47 and 48 is adapted and corresponds to the thickness of the dividing walls 56, 57 and 58 of the isolation of the reaction zone, so that they can penetrate into the slots 46, 47 and 48. In this way, the angular position of the first sub-assembly 15 with respect to the second sub-assembly is achieved simply and economically. The dividing walls and the grooves have an asymmetrical position and fit easily. The reaction zone is therefore of the male type to penetrate through its partition walls into the grooves of the pressure zone, of the female type. The sectors 43, 44 and 45 are hollow in their central portion to allow the penetration of the central ring 59 of the reaction zone 53, 54 and 55. The pressure zone 44, 43, 45 centrally presents an opening 49 that must be aligned with the opening 159 and with the opening of the central ring 59 of the reaction zone 53, 54, 55, to allow passage of the mounting means 60. The outer periphery of the pressure zone 43, 44 and 45 has a tubular configuration. In this case, the front parts of the cover 80 and of the box 70 have a rounded configuration, as can best be seen in figures 4 and 5. The pressure zone and, respectively, the hole 71, belong to this front part. . The cover 80 and the box 70 are hollow and as a whole have the shape of a rounded boat in front. As is known in the art, the passage of a current through an electric conductor causes, by Joule effect, a heating of the conductive material which is proportional to the product of the resistance of the conductive material and the square of the intensity of the current. It is therefore necessary that the section of the first conductor elements 20 to 22 be greater than the minimum section by which the temperature of these elements 20 to 22 reaches a temperature that could cause the connector to fire. These same considerations are valid in the case of the second conductive elements. Each first conductor element allows to electrically connect an electrical phase of the second sub-assembly 16 with a metallic wire of the corresponding electric cable 120 to 122. At its rear part, the clamping cover 80 has means for fixing the electric cables 120 to 122.

The rear free end of the cover 80, visible in section or section in Figure 4, includes fastening pieces 86 of the cables, and each of these fastening pieces has a generally semicircular configuration. The internal diameter of the clamping piece 86 corresponds substantially to the outer diameter of the corresponding electric cable 120 to 122. There are protrusions (without reference numeral) arranged on the inner surface of each clamping piece 86. The projections are arranged in three parallel rows and allow, during the placement of the corresponding electric cable within its related clamping part 86, to prevent any longitudinal sliding of the electric cable with respect to the cover 80. In turn, the box 70 also has on its rear part additional securing pieces 76, in front of the fastening pieces 86 of the cover 80, in order to create circular passages for the cables 120 to 122. The assembly of the first upper sub-assembly 15 is as follows: First, it is necessary to prepare the electric cables 120 to 122. For this, a portion of the free end of the sheath is removed, such so that part of the electrical wires is left bare over a given length. The bare length of each electrical wire is adjusted so that further assembly can be carried out within the box 70. The bare ends of the wires are fixed by cable terminals 123 to 125 to the first conductor elements. The cable terminals form part of the first conductive elements, as described below. Subsequently, the cables equipped with the conductive elements are mounted inside the box 70 which has positioning means 78 and with partition walls 77 for separating the conductive elements 20 to 22, as also described below. Finally, the box is closed with the cover 80, which has means 88 to prevent any lifting of the conductive means 20 to 22 as described below, to form a first manipulable, transportable and unseizable sub-assembly. Preferably, a heat-shrinkable sheath covers the fastening parts 86, 76 of the first upper sub-assembly 15, as well as each electrical cable 120 to 122 emerging from the first sub-assembly 15. After heating, the heat-shrinkable sheath ensures correct sealing between the electrical cables and the first sub-assembly 15. The second lower sub-assembly 16, which must be coupled with the first upper sub-assembly 15, is fixed on the rotating machine in the aforementioned manner. The electrically insulating support 17 is arranged at the level of its protrusion 50 around the mounting axis A-A of Figure 2, which in this case is radially oriented with respect to the axis of rotation of the rotating machine. The three second contact conductive elements 30 to 32 they are electrically insulated from one another by a molded insulating support material 17. Each of these elements has a horizontal top contact active surface, that is, its second seat 33 to 35, which emerges from the support. These active surfaces are similar to the contact seats 23 to 25 of the first conductor elements 20 to 22. In the figures, the mounting means 60 have a single screw 63 fixed to the second sub-assembly 16 and a nut 64 which is supported on the upper face of the cover 80 by means of a washer 65. This face or surface forms part of a bottom 72 of the cover 80. The screw 63 axially traverses the opening 49 of the pressure zone, as well as the central ring 59 of the area of reaction. The axis of axial symmetry of the screw 63 constitutes the assembly axis A-A. The head 61 of the screw 63 is connected, in this case indirectly, and in another embodiment directly, with the support 17. In this way, it is possible to thread the first subassembly 15 with its casing 18 on the screw 63 and ensure its fixation with the aid of a nut 64 that is screwed onto the threaded free end of the screw 63. It is possible to use other mounting means in replacement of the mounting screw 63, for example a safety fastener by means of an elastic fit or splice. In another embodiment, the mounting means consist of a rivet which replaces the screw 63. In this case, however, it is no longer possible to disassemble the connector once assembled. The solution with the screw and the Nut is preferable, since the adjustment can be better controlled. The arrangement according to the invention has the advantage that it is not affected by vibrations due to the flexural assembly of the first conductor elements. Likewise, the connector is identical to the coupling of the phases of the rotating machine, either following a configuration in star or delta, which allows to standardize the manufacturing molds of the box 70 and of the cover 80. The configuration can be appreciated compact connector, which allows to minimize the length of the outputs of the phases of the armature, which is part, in the case of an alternator or an alternator-starter motor, of the stator of the rotating machine. One can also see the presence of a single mounting means 60, between the casing 18 and the support 17. This mounting means, in this case electrically conductive, allows a uniform distribution of the pressure together with the hole 71 and the pressure zone 43 to 45. Preferably, the thyme 63 is embossed at 62 at the level of its lower head 61, such that this screw can be pressed into its plunger within an insert embedded in the protrusion 50, and thus becomes safety pin. Preferably, this insert is connected to the ground. In this case, the mounting means are fixed to the support 17. In another embodiment, the insert is replaced by a chamfering in chimney form or shot 173 coming from the same mold together with the support 170, commonly made with aluminum base, and that on its free end works as a tutor or rodrigón for the lower phase of the protuberance 50, as can be seen in Figure 2. The lower head 61 of the screw 63 rests on a projection 175 formed by taking advantage of a recess 174 made at the level of the penetration zone of the chimney 173 inside the support 170. The thyme 63 passes through the chimney 173 through its body, as well as the reaction and pressure zones and a stop washer or support 65, for example a Grower joint or a Bellevilie spring. The washer 65 rests on the upper surface of the cover opposite the pressure zone. The mounting nut 64 is then screwed onto the free end of the screw in contact with the stop washer and secures this stop washer in contact with the upper surface of the cover 80. As mentioned above, the screw 63 has a drawing 62 close to its head 61 for its anchoring inside the chimney, which internally presents at that point a local reduction in diameter for these effects, near the projection 175, as can be seen in figure 2 The thyme 63 is therefore unmissable. In another embodiment, the nut can be fixed on the upper surface of the cover and the head of the screw can rest directly or indirectly on the support 17 to be screwed to the nut. In another embodiment, the structures are inverted and the screw 63 is fixed to the cover 80 and its head 61 rests on the upper surface of the cover 80 so that it is inserted under pressure on its plies 62 inside the opening 49. Subsequently, the nut is screwed underneath, resting by its washer 65 on the projection 175. In all cases, the electrically conductive mounting means 60 includes a protruding part, for example a head or nut, which rests directly or indirectly on the cover 80, as well as a body axially traversing the pressure and pressure zones. reaction and, therefore, the first conductive elements. The axis of axial symmetry of these mounting means 60 constitutes the mounting axis AA of Figure 2. In the figures, the box 70 and the cover 80 of the crankcase 18 extend transversely with respect to the mounting axis AA of Figure 2 and they are cupped. Each has a bottom 82 and 72 respectively, bounded by a peripheral flange 83 and 73 respectively, perpendicular to the bottom 82, 73. The face or top surface of the flange 73 of the box 70 should come into contact with the lower surface of the flange 83 of the cover 80, so that after the assembly of these two parts the crankcase 18 is watertight. If necessary, a seal can be glued on one of these flanges 73, 83 to improve the sealing. The cover 80 is mounted, so that it can be disassembled, on the box 70 by seaming. For this, cover 80 has along its flange 83 projections 84, while the box 70 has along its flange 73 complementary projections 74 extending perpendicular to the projections 84. The projections 74 and 84 are, in this case, six for each group of outgoing. In figures 4 and 5 you can see its distribution. The projections 74 emerging from the rim 73 of the box 70 have U-shaped legs that are higher than the flange 73, and each delimit a housing for the corresponding solid projection 84 of the cover 80. The projections 84 each have an inclined skirt resting on the bottom of the U of the legs 74 and separates these legs during the assembly of the cover 80 with the box 70. Subsequently, the legs 74 close again, once the bottom of the U of the legs 74 is exceeded. It should be noted that it is possible to invert the structures, so that the legs come out, in this case from the flange 83, and the solid protrusions leave the flange 73. In all cases, the hollow legs 74 must be fastened by snap-fastening with the projections 84. In another embodiment, the assembly of the cover 80 with the box 70 is carried out by means of screws or by bolts that intervene at the level of the flanges 73 and 83. In another embodiment, the assembly of the cover 80 with the box 70 is made in a non-removable manner, for example by means of rivets or by gluing or welding, for example a laser-type welding or an ultrasonic welding, at the level of the flanges 73 and 83.

The upper surface of the bottom 72 of the box has two dividing walls 77, and the lower surface of the bottom 82 of the cover 80 also has two dividing walls 87. The dividing walls 77, 87 have the same configuration, and each has a front part # in the form of a circular sector that delimits the hole 71, in this case circular and large. The rear part of the dividing walls 77 and 87 is coupled to the rear part of the flange 73 and 83 respectively of the box 70 and the cover 80, each on the extension respectively of a leg 74, in the case of dividing walls 77, and of a solid projection 84, in the case of partition walls 87. The rear part of partitions 77, 87 is wider than its front part, and these walls have an intermediate part of connection between the front part. and the back. The intermediate part of the dividing walls 77, 87 has the same width as the front part and extends longitudinally as does the rear part that extends it. The front part of partition walls 77 serves to separate the first seats 23 to 25 and to isolate these seats from each other. The first seats have in this case a form of ring sector, as can be seen better in Figure 6. The sectors are separated by slots that serve to accommodate the dividing walls of the reaction zone. The dividing walls 77, 87 have a similar shape. There is play between the pressure zone 43 to 45 and the front parts, on the one hand, of the dividing walls 87 and, on the other hand, of the flange 83. The front part of the flange 73 delimits the opening or opening 71. The clamping parts 76, 86 hold the rear part of the flange 73, 83. The flanges 73, 83 have a rear part perpendicular to the two longitudinal coupling parts on a rounded front part, such that they have a rectangular configuration in which they are replaced one of the widths by a round part that constitutes the front part. The same happens with the case 70 and with the cover 80. The fastening parts 76, 86 of the cables 120 to 122 constitute clamps for these cables and have influence on the rear part of the flanges 73 and 83. The dividing walls 77 , 87 and the longitudinal parts delimit the fastening parts 76, 86, as can be seen in figures 4 and 5. As shown in these figures 4 and 5, the flanges 73, 83 and dividing walls 77, 87 delimit three housings for mounting and electrical insulation of the first three conductor elements 20 to 22, whose front parts, in the form of an annular sector, define the first three seats 23 to 25 that extend inside the hole 71, in this case in the form of circular hole. The seats 23 to 25 constitute the free ends of the conductive elements 20 to 22.

The rear part of each first conductor element 20 to 22 laterally has edges, so that, after folding the two edges, the rear part of each first conductor element 20 to 22 constitutes a connection terminal 123 to 125 that adjusts and fixes the bare ends of the electrical wires of the cables 120 to 122, in order to ensure the proper electrical contact. For this reason, the rear parts of the dividing walls 77 are wider, in order to immobilize the terminals 123 to 125. It should be noted that the amount of electrical wires of the cables 120 to 122 depends on the desired applications. Each of the connection terminals 123 to 125 serves as a mounting terminal for an electrical cable. The annular sectors constituting the first seats 23 to 25 have, in this case, the same extension and allow the passage of a strong intensity of electric current without the box 70 and the cover 80 being in danger of being affected or of catching fire, so that the configuration of three conducting elements 20 to 22 is preferable, since it allows, occupying the same space, the passage of a stronger current than in the case, for example, of a configuration of four conductive elements, ensuring at the same time time a more balanced pressure than in the case of two or four conducting elements after fixing the connector using the fixing means 60. The first conducting elements 20 to 22 consist of flat metal strips that are obtained by trimming from an electrically conductive metal plate. These bands are in the form of flexible tabs. Each first conductor element 20 to 22 has an intermediate part that joins its front part with its rear part, in the form of a terminal. The intermediate parts should rest against the bottom 72 of the box 70. Each intermediate part includes a hole (without reference number) into which a flare 78 made of a material coming from the same mold together with the bottom 72 of the box 70 penetrates. The three flares 78, at the rate of a flared by lodging of a cable, have the form of pawns with sharp end, in this case configured as a warhead, to cross the three conductive elements 20 to 22. In this way, they are constituted means for positioning the first conductor elements 20 to 22 before closing the box 70 with the cover 80 as can be seen in figure 6, so that the box 70, together with its dividing walls 77 and its flange 73, constitute a positioning box of the first electrically conductive elements 20 to 22. The cover 80 has three projecting bushes 88 coming from the same mold together with the lower surface of its bottom 82. Cad one of the bushes 88 serves as a housing for a flare 78, and rests on the corresponding first conductor element 20 to 25, as can be The flares 78 penetrate, with some play, into the sleeves 88 closed by the bottom 82. Thanks to this arrangement, each first seat 23 to 25 can be bent as a flexible beam, since it can penetrate into the hole 71 and that the intermediate part of each first conductive element 20 to 22 is clamped between the bottom 72 of the box 70 and the ferrules 88 which constitute a form of anti-lifting means of the first conductive elements 20 to 22. It is possible, of course , that the anti-lifting means 88 of the cover 80 and the positioning means 78 of the box 70 have another configuration. For example, the first conductor elements 20 to 22 can present laterally, in the case of at least one of them, a notch in which a protrusion protruding from the box 70 penetrates. The positioning means consist, in this case, of two lateral projections, while the anti-lifting means may consist of a solid projection protruding from the cover 80 and extending between the lateral projections of the box 70. In both cases, the anti-lifting means consist of a stop or stirrup leaving the cover 80. All the configurations of the box and the cover can be realized easily by means of a mold casting, since these elements are made of a moldable plastic material. Taking advantage of these characteristics, on the respectively lower and upper surfaces of the bottoms 72 and 82 are included reinforcement ribs 79, 89, of decreasing height backwards. At least some of these ribs 79, 89 butt with an annular skirt 91, 101, oriented axially along the mounting axis A-A. These skirts have a cylindrical configuration. The upper skirt 101 of the cover 80 delimits a cavity intended to receive one of the ends of the mounting means, in this case the nut 64 and its washer 65. This cavity is open towards the outside and has a bottom provided with an opening to allow the passage, as mentioned above of the screws 63 of the mounting means 60. The bottom of the cavity forms part of the bottom 82 and, therefore, of the upper surface of the cover 80. The skirt 91 of the box it has an internal diameter equivalent to the diameter of the hole 71, in this case circular. The skirt 91 thus extends axially inwards towards the lower part of the hole 71. This skirt 91 serves as a housing for the reaction zone 53 to 55 and therefore for the hollow protrusion 50 which it carries, at the level of its upper surface, the seats 33 to 35. The external diameter of the peripheral skirt of the protrusion 50 is equal to the assembly set close to the internal diameter of the skirt 91, in such a way that the assembly is watertight. The first subset is thin and easily housed, in this case on the back of the rotating electrical machine, provided when the control or drive system is not mounted on this point. The first subset 15 occupies the radial space available in this place. The simplicity of the first conductor elements 20 to 22 can be appreciated, as well as its low cost and its reliable electrical connection with the cables, thanks to the connection terminals 123 to 125. The flat shape is also used, with the exception of its back, of the first conductive elements in the form of a sheet, for bending forward these conductive elements in order to come into contact with the second seats. It should be noted that the invention is not limited to the examples of the illustrated modes. The cover 80 can be constituted by two different materials, and include a lower part made of an electrically insulating material, overmolded on a metal upper part. The box can also be constituted by two different materials and include an upper part of an electrically insulating material overmolded on a metal bottom part. The pressure zone, with or without the skirt 101, is, in another embodiment, inserted on the rest of the cover 80, for example by overmolding, gluing, securing (seaming) or welding, for example welding by ultrasound or by laser, on the rest of the roof, which in all cases supports the area of Pressure. In this case, the box and the cover are not reinforced by fibers for economic reasons, but in another embodiment it is possible to include reinforcing fibers. In one embodiment, the crankcase 18 together with the skirt 91 and the hole 71 are made by overmolding on the first electrically conductive elements, whose first seats can be perceived at the level of the hole 71. In this case, the pressure zone is inserted in the above-mentioned shape (overmolding, securing, gluing, welding, etc.) on the crankcase. In all cases, the crankcase supports the pressure zone. It should be noted that the cover may include a pressure-resistant zone and the rest thereof may be of a material less resistant to flow and reinforced by the use of fibers. This pressure zone counts on its free end, in one embodiment, with a layer or, commonly, with a coating, for example of greater durability. The pressure zone in this case has an external diameter practically identical to that of! orifice 71 so that the seats 23 to 25 can penetrate into the hole 71. Its outer diameter is, in this case, equal to the external diameter of the protrusion 50, and in another embodiment it is smaller than that of this protrusion. The intermediate part of the dividing walls 77, 87 can be eliminated, provided that the rear part thereof can retain the connection terminals 123 to 125. Of course, the height of the dividing walls 77, 87, of the flares 78 and the bushes 88, all these elements perpendicular to the bottoms 72, 82, are determined in such a way that the flanges 73, 83 can come into contact with one another. The skirt 91 allows to guide the protuberance 50 and therefore the reaction zone. During assembly, using the mounting means 60, the seats 23 to 25 are depressed by the pressure zone (and therefore by the protrusion of the cover constituting this area) and are bent when engaged within the hole 71, prolonged by the skirt 91 of cylindrical shape. After assembly, the seats 23 to 25 are under tension and conform to the shape of the second seats 33 to 35. This allows readjusting flatness defects and manufacturing tolerances. A bending movement of the seats 23 to 25 thus occurs during the assembly of the two sub-assemblies 15-16. It should be noted that the box 70 is not subjected to the efforts generated by the mounting means. In another embodiment, the pressure and reaction zones can be cylindrical and have a square or rectangular section, so that the hole can also be square or rectangular in section. It is also possible that the orifice and the pressure and reaction zones have different polygonal sections. In all cases, the pressure and reaction zones (and therefore the protrusion) have a section of size less than or equal to the section of the hole 71.

The second sub-assembly 16 and its support 17 are suitably adapted to be mounted on the starting alternator-motor of the type described in document FR-A-2 806 224. For further details reference will be made to figure 8 of this document, which illustrates the second subassembly together with its support mounted on the rear support, as well as a sensor holder that has ears or handles with oblong openings for its fixation and angular adjustment on the posterior support. This rear support has openings so that the detectors can detect the magnetic targets fixed on a lens carrier Implanted between the rotor and the rear support. This rear support is joined with a front support, for example by means of screws or rods, and in its central portion, with the help of a ball bearing, it loads the front end of the rotor shaft on which a pulley coupled by means of a coupling is fixed. transmission device including at least one band, with an arrow of entry or arrow of the impeller of an internal combustion engine of a car. The supports are set to allow circulation of the cooling air generated by the rotation of the internal fans included on the ends of the rotor. The supports are hollowed and carry in their center, with the help of ball bearings, the shaft supporting the rotor and, on its outer periphery, the stator body. These supports, preferably made of aluminum, ensure a return to the ground and have fastening and adjustment handles or adjustment on a fixed part of the car. In a In this embodiment, the starting alternator-motor is cooled by water, so that the supports have a chambers to allow the circulation of a cooling liquid, commonly water, to cool the motor of the vehicle. The second sub-assembly is spliced on a support, on which the brush holder is also fixed. The connector according to the invention therefore forms part of a connection device between the machine and an electronic box that includes an electronic command and control module, also provided with a drive and management unit. The machine is a reversible machine and therefore can operate in the mode of an electric motor to start the vehicle and, in addition, in the mode of an alternator to recharge the vehicle's battery and power the devices consuming electricity from it. For more details, reference will be made to the aforementioned document. The connector according to the invention is suitably adapted for a rotating electric machine operating at a voltage of 12V.

Claims

NOVELTY OF THE INVENTION CLAIMS

1. - An electrical connector for making an electrical connection between, on the one hand, a first sub-assembly 15 including at least two first electrically conductive elements 20, 21, 22, and each of these first elements has a first seat 23, 24, 25 and, on the other hand, a second sub-assembly 16 that includes at least two second electrically conductive elements 30, 31, 32, and each of these second elements has a second seat 33, 34, 35, in which the first seats 23, 24, 25 are intended to come into electrical contact with the second seats 33, 34, 35 by one of their surfaces, and by the other in support against a pressure zone 43, 44, 45 forming part of the first sub-assembly 15, while that the other surface of the second seats 33, 34, 35 is intended to rest against a reaction zone 53, 54, 55 that forms part of a support 17 carrying the second sub-assembly 16 in order to be able to fix the second elements 30, 31 , 32 and in which mounting means 60 intervene between the pressure zone 43, 44, 45 and the reaction zone 53, 54, 55 to hold and adjust between them the first and second seats 23, 24, 25 - 33, 34, 35, as well as exerting a contact pressure on these seats, and characterized in that the first sub-assembly 15 includes a casing 18 for fitting and bending by the first ones. conductive elements 20, 21, 22, wherein this casing includes, on the one hand, the pressure zone 43, 44, 45 and, on the other hand, in front of the pressure zone 43, 44, 45 has a hole 71 to allow a movement of the first seats 23, 24, 25.

2. The connector according to claim 1, further characterized in that the crankcase 18 is delimited, on the one hand, by a positioning box 70 of the first conductor elements 20, 21, 22 and, on the other hand, by a clamping cover 80 that supports the pressure zone 43, 44, 45, and characterized in that the box 70 includes, in front of the pressure zone 43, 44, 45, a orifice 71 to allow a movement of the first seats 23, 24, 25, and further characterized in that fixing means 74, 84 intervene between the box 74 and the cover 80.

3. The connector according to claim 2, characterized also because the cover 80, the box 70 and the support 17 are made of a mat moldable and electrically insulating waste.

4. The connector according to claim 3, further characterized in that the box 70 is made of a material less resistant to flow than that of the cover 80.

5. The connector according to claim 1, further characterized in that the pressure zone 43, 44, 45 and reaction zone 53, 54, 55 are made of an electrically insulating and flow resistant material.

6. The connector according to claim 5, further characterized in that the reaction zone 53, 54, 55 consists of a protuberance 50 whose section is of a size less than or equal to the size of the hole 71 of the crankcase 18, and further characterized in that the pressure zone 43, 44, 45 consists of a protrusion that emerges from the casing 18 and is directed towards the hole 71.

7. The connector according to claim 6, further characterized in that the reaction zone has on the projection partition walls 56, 57, 58 to separate the second seats 33, 34, 35 to each other, while the pressure zone 43, 44, 45 is separated into sectors 43, 44, 45 by radially oriented grooves 46, 47, 48, and further characterized by the width of these grooves 46. , 47, 48 is adapted and corresponds to the thickness of the dividing walls 56, 57, 58, in order that they can penetrate into the slots 46, 47, 48.

8. The connector according to claim 6, characterized in addition because the outer periphery of the reaction zone 53, 54, 55 is cylindrical in shape and is adapted to penetrate inside a cylindrical skirt 91 that has the crankcase 18., and further characterized in that the skirt 91 internally extends the hole 71, in a circular manner.

9. The connector according to claim 1, further characterized in that the mounting means 60 include a projecting part 61, 64 that rests on the casing 18, and a body axially traversing the pressure zones 43 to 45 and reaction 53 to 55, as well as the first conductive elements 20 to 22.

10. - The connector according to claim 2, further characterized in that the box 70 includes positioning means 78 for the first conductor elements 20 to 22, and further characterized in that the cover 80 has means 88 to prevent a lifting of the first elements electrically conductive conductors 20 to 22.

11. The connector according to claim 10, further characterized in that the box 70 has a bottom 72 having at least two flares 78 constituting the positioning means, and each of these flares is adapted to penetrate an opening of the first electrically conductive element for placing the latter in position, and further characterized in that the cover has a bottom 82 provided with projecting bushes 88, and in each of these bushes a flare 78 penetrates with the purpose of create a means to avoid a lifting of the first electrically conductive elements 20 to 22. 12 The connector according to claim 1, further characterized in that the first conductor elements 20 to 22 extend perpendicularly to the axis of the assembly means constituting the mounting axis, and further characterized in that the first aforementioned conductive elements have the form metal strips, and each of these bands presents in its front part a first seat 23 to 25 and in its rear part a mounting terminal 123 to 125 that is connected with an electric cable 120 to 122. 13.- The connector according to claim 1, further characterized in that it includes three first elements and three second electrically conductive elements 20 to 22-23 to 25. 14. The connector according to claim 2, further characterized in that the box 70 has dividing walls 77 for separating the first elements electrically. drivers 20 to 22 each other. 15. The connector according to claim 2, further characterized in that the cover 80 and the box 70 are recessed and each has a bottom 70, 82 delimited by a peripheral rim 73, 83 perpendicular to the aforementioned bottom, and further characterized because the fixing means include hollow protruding legs 74 emerging from one of the flanges of the cover 80 and the box 70, and these legs are intended to be snap-fastened with the projections 84 emerging from the other flange of the box 70 and the cover 80. 16. The connector according to claim 15, further characterized in that the flanges 73, 83 have in their front a rounded shape near the hole 71 of the box 70 in the shape of a circular hole, and in the back part, in a complementary manner, clamping parts for electric cables 120 to 122. 17. The connector according to claim 2, further characterized by the cover ta 80 and the box 70 have reinforcing ribs 89, 79 and with an annular skirt 101, 91 for housing, respectively, one of the ends of the mounting means 60 and the area Reaction 53 to 55. 18. A polyphase rotary electric machine, including a rear support 170, characterized in that this rear support 170 includes a support 17 of the second sub-assembly 16 forming part of a connector of claim 1, on which the first subset is assembled.